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为减轻自重,增大桥梁跨越能力,渭河大桥主桥第一联采用钢-混混合连续梁桥方案。第一联90m边跨为钢-混混合梁,其中混凝土段长36m,钢-混结合段长2.5m,钢箱梁段长51.18m。采用ANSYS 10.0建立钢-混结合段模型,进行受力性能分析。分析结果表明:全桥及钢-混结合段的破坏荷载较高,结合段的安全储备很大;钢-混结合段在最不利荷载作用下应力均较小,材料在弹性范围内;通过钢-混结合段的设计,能保证结构刚度的平稳过渡和内力平顺传递。
In order to reduce its own weight and increase the spanning capacity of the bridge, the first joint project of the main bridge of the Weihe River Bridge adopts a steel-concrete hybrid continuous girder bridge scheme. The first span of 90m is a steel-concrete hybrid beam, of which the length of concrete is 36m, the length of steel-concrete combination is 2.5m, and the length of steel box beam is 51.18m. Using ANSYS 10.0 to establish the steel-concrete mixing section model to analyze the mechanical properties. The results show that the failure load of the full bridge and the steel-concrete combined section is high, and the safety reserve of the combined section is very large. The stress of the steel-concrete combined section under the most unfavorable load is small and the material is in the elastic range. - Mixing the design of the section, to ensure a smooth transition of structural rigidity and smooth internal force transmission.